Draw-bench.



Patented Oct. 7, v|902..

H. H. KNIGHT.

DRAW BENCH.

(Applicltion Bled May 13, 1902.1

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Patented not. 7, |902."

H. H. KNIGHT.A

v DRAW BENCH.

, (Application led Hay 13', 1902.)

(No Model.)

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Patented Oct. 7, |902.- H. H. KNIGHT.

DRAW BENCH.

(Application led May 13, 1902.)

3 Sheets-Shut'. 3.

(lo Model.)

wrrNEssEs Unirse STATESA PATENT OFFICE,

HARRY HARVEY KNIGHT, OF KINGS HEATH, NEAR BIRMINGHAM, ENGLAND, ASSIGNORTO HUDSON BROTHERS, LIMITED, OF KINGS NORTON, NEAR BIRMINGHAM, ENGLAND,A CORPORATION OF GREAT BRITAIN.

D RAW- B E N C H SPECIFICATION forming part of Letters Patent No.710,915, dated October 7, 1902.

Application filed May 13, 1902. Serial No. 107,151. (No model.)

To all wlwnt it may concern;

De it known that I, HARRY HARVEY KNIGHT, works foreman, a subject of theKing of Great Britain, residing at 23 Brook? lyn Villas, Avenue road,Kings Heath, near vBirmingham, England, have invented certain new anduseful Improvements Relating to Draw-Benches, of which the following isa specification.

to This invention has relation to the drawbenches or machinery employedin drawing steel and other metallic tubing, and has particular referenceto the traveling wagons or trolleys which carry the pliers or grippersfor i5 seizing the tagged end ofthe tube to be drawn and the balancedhook or catch which engages with the endless draw-chain of the bench anddrags the wagon after it, such wagons being usually employed inconnection with a plug-mandrel fixed inside the drawing-die, which isusually mounted at one end of the bench, while the gearing for drivingthe chain is arranged at the opposite end. In the present method ofdrawing by this machinery after the tube has been drawn through the dieit is released by the grippers and then the wagon has to be dragged backto the die end of the bench by hand, this being usually done by anattendant,\vho 3o is known in the trade as a plier-minder and whosespecial duty it is to take the wagon back after each draw.

Now the object of this invention is to provide the draw-bench or drawingmachinery with automatic or self-acting mechanism for returning thewagon to the die end of the machine immediately7 it becomesYdisconnected from the tube, or, in other words, to provide the benchwith an automatic plier-minder. 4o Figure l of the accompanying drawingsrepresents in side elevation a draw bench or machine for drawing steeltubes provided with self -acting means for returning the wagon whichcarries the gripping-pliers to the die end of the machine after thecompletion of each draw or in the event of the pliers becoming liberatedfrom the tube in consequence of the latter breaking while being drawn orfrom any other canse. This view shows the positions of the various partswhen 5o a tube is in the act of being drawn through the die and thewagon is being traversed along the bench in the direction indicated bythe arrow by the pull of the endless traveling chain with whichthe-draw-hook of the wagon is engaged. Fig. 2 is a similar elevation ofthe machine to that represented in Eig. l, but shows the positionsassumed by the parts should thetubc break and the draw-hook of the wagonbecome disengaged from the trav- 6o eling chain. Fig. 3 is anotherelevation showing how the wagon isautomatically returned or drawn backto the die end of the machine by the special means provided for thatpurpose. Fig. I is a top side plan of the machine, 65 the several partsbeingin the samepositions as shown in Eig. 3. Fig. 5 represents, upon anenlarged scale,a transverse vertical section of the machine upon thedotted line m, showing more clearly the arrangement of the self-act- 7oing means provided in connection with the wagon for effecting its returnto the back of the die. Fig. 6 isa separate View ofthe traveling wagon,showing the arrangement of the pivoted and balanced hook which engageswith the traveling chain.

The same letters of reference indicate corresponding parts in theseveral figures of the drawings.

According to this invention it is proposed 8o to arrange at the oppositeends of one side of the draw-bench d a pair of grooved or other pulleysb and c, the former of which is keyed to a spindle b', which is drivenby a pinion b2 from the spur-Wheel b3, this latter Si' being made fastto the shaft b of the usualV gear provided for driving the endless chain(l of the bench, while the other pulley c is arranged to run loose upona fixed spindle d, and around these two pulleys an endless rope 9o orband e is arranged, the motion imparted to the live pulleyfrom thegearing being such that the rope is driven around the reverse Way to thetraveling chain of the bench.

The wagon or trolleyfis of the ordinary construction and is providedwith a self-acting rope-gripping device g, which comes into action whenthe wagon is freed from the tube and automatically establishesconnection be tween the wagon and the traveling rope, which then drawsback the said wagon up to the die end a of the bench and in the reversedirection to that in which it was drawn by the traveling chain whenpulling the tube through the die. Thus in the arrangement of wagon shownin Ithe drawings one side of the wheeled frame f' of the same isprovided with a bracket g, having a hanging arm g2, the lower end ofwhich is formed into or itted with a hook or trough-shaped or equivalentbearing or guide g3, through which the endless rope normally passes,while that end of the trolley-hook or chain-catch f2 which is presentedtoward the die end of the bench is weighted or balanced at f3, theeffect of this being to tilt the catch out of its engagement with thechain when the resistance from the tube is overcome, which happens whenthe tube is drawn through or should the tube break in the act of beingdrawn. To the one side of this weighted end of the catch a secondbracket g4 is attached, 'with a depending arm g5, whose lower endcarries an inverted hook or trough-section bearing end Q6, whichnormally lies above the rope (see Fig. 5) and in advance of the hook ofthe frame-bracket or xed part of the trolley; but when the weighted endof the catch drops on the completion of the draw-through orwhen the drawis interrupted by the breakage of the tube this inverted hook comes ontothe rope, which is gripped, as shown in Fig. 2, by the reversed hooks ofthe respective arms or brackets on the tilting part and the iXed part ofthe trolley, and thus a frictional connection is set up between the ropeand the gripping device upon the wagon sufficient to enable the latterto be brought back to the die end of the bench by the pull of thetraveling rope.

Instead of having reverse hooks at the gripping ends of the brackets thesame may be provided with eyes or loops so arranged as to admit of thefree travel of the rope through them under normal conditions, butadapted to grip or frictionally hold the said rope when the wagon-catchtilts out of the chain.

Having fully described my invention, what I desire to claim and secureby Letters Patent isl. In draw-benches or drawing machinery;

automatic or self-acting mechanism for returning the plier-wagon to thedie end of the bench immediately it becomes disconnected from the objectbeing drawn, consisting of an endless driven rope, band or chaintraveling in the opposite direction to the benchchaiu, combined with aplier-Wagon, and a gripping device mounted on the wagon provided withmeans to automatically engage the said return rope, band or chain whenthe said wagon frees itself from the bench-chain, substantially asherein described and set forth.

2. In draw-benches or drawing machinery; automatic or self-actingmechanism for returning the plier-wagon to the die end of the bench,consisting of an endless rope or band traveling in the oppositedirection to the bench-chain, a plier-wagon provided with a balancechain-catch, and a gripping device mounted on the wagon and comprising ahooked arm fixed to the body of the said wagon and a second hooked armwith the hook reversed fixed to a balanced chaincatch, with the saidrope or band passing be tween the reversed hooks, the several partsbeing arranged combined and operating substantiallyin the manner hereindescribed and set forth.

3. In draw-benches or drawing machinery; the combination with a pair ofpulleys at the opposite ends of one side of the bench, with one pulleyrunning loose and the other being driven from the gear of the bench, andan endless rope or band running around the pulleys and traveling in theopposite direction to the bench-chain, of a plier-wagon having abalanced or weighted chain-catch, and a rope-gripping device consistingof a pair of arms with reversed hooks, attached respectively to thewagon-body and to the chain catch thereof, with the traveling roperunning between the said hooks; the several parts being arranged andcombined to operate substantially as herein described and set forth.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

HARRY HARVEY KNIGHT.

Vitnesses:

HENRY L. KERRETT, ARTHUR T. SADLER.

